Here's what the Silverstone site says:
The same as if you were installing macOS.
I was hoping to find out what was causing a particular behaviour - not important now but still puzzling. -
When the card only had the NVMe drive and the OS was set to boot from the USB it would boot from USB and show the NVMe drive, as a boot option on the first clover screen.
If I added a standard SATA drive with a Hackintosh install on, directly to the MB (not to the SSD card holding the NVMe drive), it would boot clover from the USB and NOT show the NVMe drive as a clover option but only show the standard SATA drive.
Unhiding drives in Clover still didnt show the NVMe drive.
If it then loaded OSX from the standard SATA the NVMe drive would show in OSX.
Just to add - that upto now on this double SSD on a card build, I didnt put anything in L/Extensions. I think I need to understand more about where kexts should go but atm intending to go with put most in both and select "Detect" in clover. Any thoughts?